package rpt.task;

import java.security.*;

public class Encrypt {

	private final static String[] hexDigits = {
		"0", "1", "2", "3", "4", "5", "6", "7",
		"8", "9", "a", "b", "c", "d", "e", "f"};

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0)
			n = 256 + n;
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}
	
	private static String byteArrayToHexString(byte[] b) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			resultSb.append(byteToHexString(b[i]));
		}
		return resultSb.toString();
	}

	public static String MD5Encode(String origin) {
		String resultString = null;
		try {
			resultString=new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString=byteArrayToHexString(md.digest(resultString.getBytes()));
		} catch (Exception ex) {
		}
		return resultString;
	}

	public static String calcUserEncrypt(String uid, String soundCode) {
		if( soundCode == null ) 
			return null;
		//return MD5Encode(uid+soundCode);
		return MD5.md5(uid+soundCode);
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String ms = Encrypt.MD5Encode("123456");
		System.out.println(calcUserEncrypt("smp","smp"));
	}
}
